Which model? They have the 02G-P4-2676-KR "Limited Edition" (941/1019 clocks) and 02G-P4-2678-KR (1006/1084 clocks). You can get the 02G-P4-2676-KR for $340 new. If it's the 02G-P4-2678-KR with the higher clock then $300-$325 seems like a decent price.

Hey guys.
Someone selling locally put up a 670 for $325 used. Says it works fine and comes with warranty. Should I go for it? It is the 2GB version.

OP if you are in the US don't go for that deal . here is the EVGA GTX 670 FTW LE for 378 (348 with mail in rebate). uses the same reference GTX 680 PCB as GTX 670 FTW. comes with 2 games. borderlands 2 and assassins creed 3. if you want to play these games then its a no brainer. if you don't want to play these games you can sell these for 50 - 60% of the steam retail price . 40 - 50 bucks. that would still bring the cost to 328 - 338 ( 298 - 308 with mail in rebate).